Remove carray use and comment

src/dc_tools.rs

@@ -17,7 +17,6 @@ const ELLIPSE: &'static str = "[...]";
 
 /* Some tools and enhancements to the used libraries, there should be
 no references to Context and other "larger" classes here. */
-// for carray etc.
 /* ** library-private **********************************************************/
 /* math tools */
 pub fn dc_exactly_one_bit_set(v: libc::c_int) -> bool {

src/types.rs

@@ -2,7 +2,6 @@
 use crate::constants::Event;
 use crate::context::Context;
 
-pub use mmime::carray::*;
 pub use mmime::clist::*;
 pub use rusqlite::ffi::*;